A C-String is an array of char's where the last element is a null character ( '\0' ) which evaluates to false in boolean context. Walk the array with a while loop and an index variable that you will increment++, looking for a '-'. When you find a '-', assign that element a '_'. When you reach a '\0', you're done.

size_t i = 0;
while( cstring[i] ) {
    if( cstring[i] == '-' )
        cstring[i] = '_';
    i++;
}

[download]

Or without an index, but with pointer arithmatic...

char * temp = cstring;
while( *temp ) {
    if( *temp == '-' )
        *temp = '_';
    temp++;
}

[download]

You did mention C strings. If you're using the string class, it's a little different.


Dave

In reply to Re: Thinkin' Perl in C++ by davido
in thread Thinkin' Perl in C++ by gibsonca

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